By the way, is there any requirement for athletes, diplomats or audient who join the Beijing Olympic to be vaccinated or would be rejected entry into China?
Seem like vaccinations and pcr testing is mandatory. But they can get medical exemptions. And it will be a closed loop.
In the Olympics website, they say vaccinated people need not do 21 days quarantine. I'm not sure if that means those unvaccinated with no exemptions need to do quarantine though.